3loop bug: STATIC needcalc prevents recalculation of threshold corrections even if they are needed

Signed-off-by: BAllanach <B.C.Allanach@damtp.cam.ac.uk>
3loop clean up threshold eval

Signed-off-by: BAllanach <B.C.Allanach@damtp.cam.ac.uk>
Added back the scanning programs
Got rid of debugging statement in scan